reverted:
--- b/core/themes/bartik/css/components/field.css
+++ a/core/themes/bartik/css/components/field.css
@@ -96,6 +96,3 @@
   padding: 0 0 0 1em;
   float: right;
 }
-.field--type-datetime .label {
-  font-size: 0.929em;
-}
only in patch2:
unchanged:
--- a/core/themes/bartik/css/components/form.css
+++ b/core/themes/bartik/css/components/form.css
@@ -116,9 +116,13 @@ input.form-submit:focus {
   margin-right: 1.2em;
   margin-left: 0;
 }
-.form-item label {
+.form-item label,
+.form-wrapper .label {
   font-size: 0.929em;
 }
+.form-wrapper .field-multiple-table .label {
+  font-size: inherit;
+}
 .form-type-radio label,
 .form-type-checkbox label {
   margin-left: 4px; /* LTR */